CZ 452 actions are manufactured from steel billets, not tubing or plastic, and the barrels are hammer-forged for accuracy and long life. The trigger is adjustable for weight and the safety is located above the rear of the bolt and provides a positive firing pin block. The 452 Varmint model features a heavy barrel for increased accuracy and a finely checkered Turkish walnut stock. This new generation of rimfire rifles has a single set trigger primarily designed for the American market. 1:16" twist rate.